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(No Model.) I 2 Sheets-Sheetl l. S. B. STINE.

MINING MACHINE. No. 443,586. Patented Deo. 30, 1890.

- 2 Sheets-Sheet 2.

S. B. STINE. MINING MACHINE.

(No Model.)

No. 443,586. Patented'neo. so, 1.890,

UNITED STATES PATENT OFFICE.

SAMUEL B. STINE, OF OSCEOLA MILLS, PENNSYLVANIA, ASSIGNOR OF TVO- THIRDSTO GEORGE M. BRISBIN AND I). R. GOOD, BOTH OF SAME PLACE.'

MINING-Mmmm.

SPECIFICATION forming part of Letters Patent No. 443,586, dated December30, 1890.

Application tiled October 26, 1889. Serial No. 328,255. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL B. STINE, a resident of Osceola Mills,in thecounty of Clearfield and State of Pennsylvania, have in= vented a newand useful Improvement in Mining-Machines and I do hereby declare thefollowing to be a full, clear, and exact de scription thereof.

My invention relates to mining1nacl1i11esthat is, machines forundercutting coal in mines-and has special reference to machines of thiskind operated by electric or like power obtained from a motor on aseparate movable car, apparatus for this purpose being shown in LettersPatent No. 411,200, granted to E. M. Lechner on September 17, 1889.

The object of my invention is to improve the construction ofthis classof machinery where the cutting apparatus is at the forward end of thecarriage and is operated from a cross-shaft at the rear end of thecarriage by drivng-chains.

The apparatus formingthe subjectmatter of the present applicationcomprises certain improvements in the driving and feeding mechanism,which will be hereinafter particularly described and claimed.

To enable others skilled in the art to make and use my invention,l willdescribe the same more fully, referring to the accompanying drawings, inwhich Figure 1 is a plan view of the machine embodying my invention.Fig. 2 is a longitudinal section on the line 2 2, Fig. 1. Fig-3 is arear view of the machine, and Fig. 4. is a side view of the rear part ofthe machine.

Like letters of reference indicate like parts tionary bed is the crossbar or brace d and at the rear end thereof the cross-bar or brace d,which bars,- with the side bars or housings c, form the body of thestationary bed. Mounted in the stand or braokete, at the rear of the beda and at one side thereof, is the vertical shaft e, which carries at itsupper end the grooved pulley f, around which the driving-rope from theelectric motor on the separate movable car or carriage passes, so as 6oto rotate this vertical shaft e. The shaft e has the bevel-pinion e2,which meshes with the bevel-pinion g on the end of the grooved shaft g,this grooved shaft being mounted in the stand-bearing e and in a box orbearing g2 at the forward end of the bed, and the shaft extendinglongitudinally of the bed and, as preferred by me, along one side of thebed above one of the housings. The sliding frame or carriage b has theside bars b running in 7c the housings c, and at the rear end of thecarriage has the plate h, on which the power mechanism is mounted. Ithas at the forward end thereof the cutter-bar or other cutting mechanismc, and in the construction shown has back of the same the forwardchain-shaft 1l', which connects with the cutterbar by the cog-gearing i2713.

At the rear of the machine, and on the same horizontal plane as thegrooved sha-ft g, is the 8o cross-shaft 7c, which is mounted in bearingsk and carries at the end, near the grooved shaft g, the bevel-gear 7c?.The bevel-gear 7a2 meshes with the bevel gear l, which lits around thegrooved shaft g and engages therewith by a feather, said bevel-gearbeing journaled in a bearing l extending up from the plate 7L, and thebevel-gear Zmoving with the carriage h and acting to transmit the powerfrom the grooved shaft gto the cross-shaft k. 9o Mounted on said plate,but back of and below the cross-shaft 7c, is the` chain-driving shaft m,which is driven from the shaft 7c by the small pinion k3 meshing withthe large pinion m on said shaft m. The said shaftm carries a series ofsprockets, over which pass the driving-chains n, which extend to theforA ward end of the carriage and pass around sprockets on the forwardchain-shaft i', so transmitting power to said shaft and enabling 1 oo itthrough the piuions i3 to drive the cutter-bar.

In order to feed` the machine forward and draw it back after the makingof the out, I employa rotating screw-bar p, which extends longitudinallyof the machine and moves with the traveling carriage, the screw-barengagin with a nut di on the forward cross-brace d of the stationary bedand being mounted at ,its rear end in asuitable bearing je on the plate7L. In order to rotate this screw-shaft to feed the carriage forward, Iemploy the feeding worm-gear 0', and to rotate it to draw the carriageback I employ the worm-gear s, which worin-gears are mounted loosely onthe rear end of the screw-bar j), and are thrown into engagementtherewith by the clutoht, operated by the clutch-lever t. The worm-gearr, for feeding the carriage forward, is engaged by a worm r on thechain-driving shaft fm, and the worm-gear s, for withdrawing or recedingthe carriage,is engaged by the wormgear s' on the cross-shaft 7a, saidworm being o f large diameter, so that it meshes with the worm-gear S,even though the cross-shaft 7c extends on a higher horizontal plane thanthe cross-shaft m. rlhe pitch of these worms and worm-gears is such asto provide a com para-- tively slow feeding action from theslowerrunning shaft in and a comparatively rapid receding action fromthe shaft 7.2, which generally rotates at about four limes the speed ofthe shaft m.

In the operation of the machine constructed as above described the bedof the machine is placed opposite the body of coal to be out and thedriving-rope from the electric motor or other power apparatus on themovable car is placed around the pulley f and the motor adjusted so asto bring the proper tension on the rope. The power is transmitted fromthis rope, through the pulley j", to the vertical sl1aftc,and thence tothe grooved shaft g, and by the bevelgeari ng Z kl to the cross-shaft7u, from Said shaft by gearing 7e3 nt to the chaindriving shaft m, andthence by the chains to the cutter-bar, as above described, thecutterbar being rotated at a high speed, and, in the apparatus shown,cutting in an upward direction, which is found very desirable in suchmachines.

tor draws the clutch out of engagement with The operator then, by meansof the clutch-lever t', throws the clutch into enthe worm-gear yr andthrows it into engagement with the worm-gear s, in which case the worm son the cross-shaft 7a operates to rotate the screw-bar in theopposite'direction, and so to draw back the carriage from the body ofcoal, the carriage being drawn back rapidly, and in this way the cut iscompleted. As soon as the carriage is drawn back the machine is movedthe proper distance to make another cut, the driving-rope adjusted tothe proper tension, and the operation repeated.

The machine constructed as above de scribed is strong,as the partsthereof are few and simple and may be made heavy, so that they willv notget out of order. ly placing t-he longitudinally-extending grooved shaftg at the side of the machine I am enabled to drive the cross-shafttherefrom by the ordinary cog-gearing and provide for the properrotation of the different parts necessary for transmitting power andoperating the machine.

Practical use of a machine constructed as above described has proven itto be eiiicient for the purpose.

No claim is made in this application'for the specific improvenienteshown herein, which are set forth and claimed in the application filedby me September 20, 1889, Serial No. seiten.

That I claim as my invention, and desire to secure by Letters latent, is

In a'mining-machine, the combination of a bed having therein a groovedpower-shaft and a nut at the forward end thereof, a carriage travelingthereon and having a-cutting apparatus at t-he forward end, across-shaft near the rear of the carriage, and power-connections betweenthe grooved power-shaft and said cross-shaft, a cross-shaft below saidcrossshaft and gearing therewith and connected by chains with thecutting apparatus, a screwbar extending longitudinally below saidcrosssh afts and engaging with said n ut on the bed, a large worm on theupper cross-shaft,asmall worm on the lower cross-shaft, and wormgearsmounted on said screw-bar witlrwhich said worms engage, substantially asand for the purposes set forth.

In testimony whereof l, the said SAMUELU. STIXE, have hereunto set myhand.

SAMUEL l5. S'lINlC.

Witnesses:

C. W. Hams, JA con Rrrzna IOO

